Atomic Number: 81
Atomic Mass: 204.381
Number of Proton: 81
Number of Neutrons: 123
Number of electrons: 81
Period Number: 6
Group Number: 13
Melting point: 304°CBoiling point: 1473°C
State: Solid
Density: 11.8 grams per cubic centimeter
Metal
Color: Silvery white
Thallium was discovered in 1861 by Sir William Crookes. Crookes found this element in residues of sulfuric acid production.
Flammable: Yes Thallium seems not to react with air-free water. Thallium metal tarnishes slowly in moist air or dissolves in water to give poisonous thallium(I) hydroxide. Thallium dissolves only slowly in sulphuric acid.Thallium metal reacts vigorously with fluorine.Interesting facts: From the Greek word for a green shoot or twig thallos. Picture of element: http://www.webelements.com/_media/elements/element-pics-theo/81_Tl_1.jpg
Thallium
Atomic Number: 81
Atomic Mass: 204.381
Number of Proton: 81
Number of Neutrons: 123
Number of electrons: 81
Period Number: 6
Group Number: 13
Melting point:
304°CBoiling point: 1473°C
State: Solid
Density:
11.8 grams per cubic centimeter
Metal
Color: Silvery white
Thallium was discovered in 1861 by Sir William Crookes. Crookes found this element in residues of sulfuric acid production.
Flammable: Yes
Thallium seems not to react with air-free water. Thallium metal tarnishes slowly in moist air or dissolves in water to give poisonous thallium(I) hydroxide.
Thallium dissolves only slowly in sulphuric acid.Thallium metal reacts vigorously with fluorine.Interesting facts: From the Greek word for a green shoot or twig thallos. Picture of element:
http://www.webelements.com/_media/elements/element-pics-theo/81_Tl_1.jpg
Other good websites:
http://education.jlab.org/itselemental/ele081.html